importing a tiff file

i am currently using the demo version of FEflow 5.3..i tried to import a tiff file that i had georeferenced using ArcGIS but i was unable to do so and received an error saying "no projected model type!"

kindly help

thanks,
jayanthi

Please make sure that
1. Your geographical reference is saved in a *.tfw file with the same file name as the tiff file.
2. The coordinate system you use is a metric and rectangular system. FEFLOW does not support geographical coordinate systems.